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marissa [1.9K]
3 years ago
5

Prove that tan60+tan70-tan50+tan10=2sqrt3?

Mathematics
1 answer:
LiRa [457]3 years ago
8 0
{tan(60) + tan(10)}/{1 - tan(60)*tan(10)} - {tan(60) - tan(10)}/{1 + tan(10)*tan(60)} 

<span>ii) Taking LCM & simplifying with applying tan(60) = √3, the above simplifies to: </span>

<span>= 8*tan(10)/{1 - 3*tan²(10)} </span>

<span>iii) So tan(70) - tan(50) + tan(10) = 8*tan(10)/{1 - 3*tan²(10)} + tan(10) </span>

<span>= [8*tan(10) + tan(10) - 3*tan³(10)]/{1 - 3*tan²(10)} </span>

<span>= [9*tan(10) - 3*tan³(10)]/{1 - 3*tan²(10)} </span>

<span>= 3 [3*tan(10) - tan³(10)]/{1 - 3*tan²(10)} </span>

<span>= 3*tan(30) = 3*(1/√3) = √3 [Proved] </span>

<span>[Since tan(3A) = {3*tan(A) - tan³(A)}/{1 - 3*tan²(A)}, </span>
<span>{3*tan(10) - tan³(10)}/{1 - 3*tan²(10)} = tan(3*10) = tan(30)]</span>
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4x-5.2y + 6y + 7.9x - 8x
Ipatiy [6.2K]

Answer:

3.9x + 0.8y

Step-by-step explanation:

this is your answer

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3 years ago
Find the integer that lies between <img src="https://tex.z-dn.net/?f=%24%5Csqrt%5B3%5D%7B-45%7D%24%20and%20%24%5Csqrt%5B3%5D%7B-
Romashka-Z-Leto [24]

∛(-45) = ∛((-1) × 45) = ∛(-1) × ∛45 = -∛45

Similarly,

∛(-101) = - ∛101

Now,

• 3³ = 27 and 4³ = 64, and 27 < 46 < 64, so ∛27 < ∛45 < ∛64, which places ∛45 between 3 and 4

• 5³ = 125, so ∛101 would similarly fall between 4 and 5

So to summarize, we have

3 < ∛45 < 4 < ∛101 < 5

so that

-5 < ∛(-45) < -4 < ∛(-101) < -3

so the integer between these numbers is -4.

4 0
2 years ago
Solve for v in terms of s, t, u, and w.<br> wv=uts<br><br> v=___
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wv=uts\implies v=\frac{uts}{w}

we needed to eliminate w, do so by diving both sides by w and obtain the above result :)

Hope this helps.

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If Sarah turns 15 on august 27 and her graduation year is 2024 how old will she be when she graduates high school?
mart [117]

Answer:

She will be 17

Step-by-step explanation:

My sister is like that but she's graduating in 22'

4 0
2 years ago
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gulaghasi [49]

Answer:

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Step-by-step explanation:

Step 1: Write expression

3(x + 2) - 5x

Step 2: Distribute

3x + 6 - 5x

Step 3: Combine like terms

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7 0
2 years ago
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